精煉塔爾油在磷酸鹽浮選中的應用及QCM-D吸附研究

孫體昌; 寇玨; Daniel Tao; 許廣洋

doi:10.13374/j.issn1001-053x.2010.11.004

精煉塔爾油在磷酸鹽浮選中的應用及QCM-D吸附研究

doi: 10.13374/j.issn1001-053x.2010.11.004

1. 北京科技大學土木與環境工程學院, 北京 100083;
2. 肯塔基大學采礦工程系, 列克星頓, KY40506, 美國

詳細信息

作者簡介:
孫體昌(1958-),男,教授,博士生導師,E-mail:suntc@ces.ustb.edu.cn

中圖分類號: TD923⁺.1
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- 被引次數: 0
出版歷程
- 收稿日期: 2010-03-29

Phosphate flotation and QCM-D adsorption study of refined tall oil

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Department of Mining Engineering, University of Kentucky, Lexington, KY 40506, USA

摘要

摘要: 對Georgia-Pacific公司新開發的精煉塔爾油捕收劑GP193G75在佛羅里達CF Industries公司的磷酸鹽浮選中應用效果進行了研究.采用具有測定能量耗散功能的石英晶體微天平(QCM-D)研究了GP193G75在羥基磷灰石(HAP)表面的吸附過程,并與油酸鈉和CF Industries公司目前所用的藥劑粗塔爾油脂肪酸PR1進行了比較.考察了捕收劑用量、pH值、柴油用量和浮選時間等參數對GP193G75浮選效果的影響.結果表明,當pH值為10,捕收劑用量為0.45kg·t^-1,且與柴油用量的比例為9∶8時,GP193G75的正浮選P₂O₅回收率最高可達到91.7%.QCM-D測定結果顯示,GP193G75與油酸鈉有相似的吸附過程,但GP193G75比油酸鈉更易于且更快在羥基磷灰石表面吸附.在相同條件下,與PR1相比,GP193G75形成的吸附層密度更大,而且吸附更牢固,因此可以使羥基磷灰石表面的疏水性更強,從而得到較高的浮選效果.
- 磷酸鹽 /
- 浮選 /
- 羥基磷灰石 /
- 浮選藥劑 /
- 吸附
Abstract: GP193G75,a newly developed refined tall oil supplied by Georgia-Pacific Chemicals LLC,was investigated as a collector for the flotation of phosphate ore from CF Industries' phosphate rock mine in Florida.Its adsorption on the surface of hydroxyapatite was characterized using a quartz crystal microbalance with dissipation(QCM-D) in comparison with sodium oleate and the plant collector of CF Industries(PR1) which was the mixed crude tall oil fatty acid.The effect of the new collector GP193G75 on phosphate flotation was evaluated at different process parameters such as collector dosage,pH values,diesel dosage and flotation time.The results show that the highest recovery of 91.7% is achieved when the refined tall oil is used at the dosage of 0.45kg·t^-1 at pH 10 with a 9∶8 mass ratio of fatty acid to diesel.The data of QCM-D show the similar adsorption process with GP193G75 and sodium oleate,and GP193G75 adsorbs on hydroxyapatite more readily and quickly than sodium oleate.In comparison with PR1,GP193G75 forms a higher adsorption density and a more rigid adsorption layer,which produce a stronger hydrophobicity and a better flotation performance.
- phosphates /
- flotation /
- hydroxyapatite /
- flotation reagents /
- adsorption